摘要
本文研究了将硬币置于冷却的瓶子瓶口,放置于相对高温环境中,硬币发生多次弹起的现象.本文利用零维非稳态传热学方程描述了瓶内气体温度的变化,通过力矩分析得到了硬币弹起的条件,并采用MATLAB数值模拟研究了硬币多次弹起时压强和弹起周期随时间的变化规律.并通过不同材质的瓶子和不同的硬币研究了对该弹起现象的影响,实验得到了和理论一致的结果.
In this paper,we study the phenomenon that the coin placed on a cooled bottle neck will jump for several times when placing them in a relatively high temperature.The zero-dimensional transient heat transferring equation is used to describe the change of air temperature in the bottle.The condition for the jumping of coin is obtained from the force moment analysis.And MATLAB numerical simulation is used to study the change of air pressure in bottle and period of jumping.Then,the effects of the phenomenon are studied through different kinds of bottles and of coins,which obtain the same results as the theoretical analysis.
作者
庆秉承
刘萍
袁识博
孔春才
方爱平
田蓬勃
李宏荣
高宏
王小力
QING Bing-cheng;LIU Ping;YUAN Shi-bo;KONG Chun-cai;Fang Ai-ping;TIAN Peng-bo;LI Hong-rong;GAO Hong;WANG Xiao-li(School of Science,Xi’an Jiaotong University,Xi’an,Shaanxi 710049,China)
出处
《大学物理》
2019年第12期52-56,共5页
College Physics
基金
教育部高等学校教学研究项目(DWJZW201705xb)
西安交通大学本科教学改革研究基础课专题(1802Z-04)
西安交通大学本科教学改革研究项目(17ZX05,1803Z)资助
关键词
热力学
零维非稳态传热学方程
硬币弹起
冷瓶
thermodynamics
zero-dimensional-transient-heat-transferring-equation
numerical-simulation
jumping-coin
cooled-bottle
